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the green energy website |
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lets go hydro |
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By the bio |
H-rotor are VAWT, vertical axis wind
turbines (the axle on which it rotates is vertical as opposed to that
seen on the more familiar type of horizontal axis wind turbines, HAWT)
that have not gained hugely in popularity. Mathematically they are not
as efficient because as they revolve one blade is being pushed by the
wind whilst the other is coming back into
 the
wind. In other words, only half of the blades are working. Still, this
does not mean they are not worthy of further research and they do have
the advantage that they never need pointing into the wind like a
traditional windmill. Another variant is to add a third blade which
helps improve the ratio of blades being driven by the wind. There is
presently still a lot of scope to improve VAWT technology but little
funding is presently available to allow such research.Energy output - Currently upto 250-300Kwh for large machines but 1Mw or more currently in design Size - From small, house mounted designs to proptotypes over 25mtrs in diameter Construction - Blades generally from steel or hi-tensile plastic on small versions. Mounting towers generally made from wood, steel or concrete though use of exisitng structures can be utilised. |
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